New Client Books Onboarding Checklist for September 28 in QuickBooks Online

September 28, 2026

Bottom line: Take over new client books on September 28, 2026 with one dated checklist where access, opening balances, chart mapping, bank connections, and historical cleanup triage each have an owner, evidence, and a clear status. The useful output on September 28, 2026 is a takeover packet with 14 checklist items worked, 3 opening-balance gaps isolated, and a 60-day cleanup plan with named approvals, not a login handoff with unknown history.

Why this matters on September 28, 2026

On September 28, 2026, small business owners who change bookkeepers or start with a virtual assistant need a takeover that an accountant can pick up without guessing what was verified and what was assumed. Opening balances carry prior history into every future report, the chart of accounts shapes every coding decision after onboarding, and bank connections determine whether the feed history is complete or full of gaps. When a takeover happens without a checklist on September 28, 2026, the new books inherit duplicate vendors, uncleared opening adjustments, disconnected feeds, and uncategorized history that surface months later during tax preparation.

A virtual assistant handles the daily preparation for this checklist. The VA confirms user access and permissions, collects prior reports and tax filings provided by the client, drafts the opening-balance tie-out, maps the existing chart to the working structure, checks bank and card connections, and triages historical transactions into clean, fixable, and accountant-review buckets. The owner or accountant keeps approval for opening balances, chart changes, close of historical periods, and the cleanup sequence. That separation protects the September 28, 2026 records from well-meant corrections where an old balance gets overwritten without support. Owners deciding what to delegate can review role boundaries on the services page, see practical delegation patterns in the bookkeeping tasks guide, and route the first handoff through the contact page.

Without a defined checklist, evidence for a takeover scatters across email passwords, screenshots of prior software, PDF trial balances, bank portal logins, and unlinked QuickBooks Online attachments. The VA sees an opening equity adjustment but cannot tell whether it represents verified retained history or a plug that forces agreement. The September 28, 2026 checklist restores that visibility by recording the source location, the QuickBooks Online screen or report, the current status, and the specific question for the reviewer in one place. Related discipline for vendor master setup appears in the vendor onboarding guide, and the close linkage is explained in the month-end close packet.

Example on September 28, 2026: A law firm moves its books to a new QuickBooks Online file with VA support on September 28, 2026. The VA works a 14-item takeover checklist covering admin access, user roles, opening trial balance, bank and card connections for 4 accounts, chart mapping across 62 accounts, sales item mapping for 18 billing codes, vendor and customer list imports, undeposited history, open payables and receivables, payroll handoff, document storage locations, and the historical cleanup triage. The draft tie-out finds 3 opening-balance gaps: one operating account opening balance differs from the bank statement by $4,120 because of outstanding checks omitted from the handoff, one client trust subledger exceeds the bank balance by $1,850 because of an unrecorded disbursement, and one credit card opening balance is missing $620 in accrued charges from the cutoff statement. Without the checklist the firm would start posting into balances that do not agree. With the September 28, 2026 checklist the VA attaches the prior trial balance, the bank statements, and the subledger exports, isolates the 3 gaps with amounts, confirms the other 11 items as complete, and proposes a 60-day cleanup plan that sequences balance corrections first, feed history second, and categorized catch-up last for accountant approval.

Confirm access, chart mapping, and connections on September 28, 2026

Write down the company file, the users and roles granted, the chart of accounts version reviewed, the bank and card accounts connected, the item and list imports completed, filters, export times, and preparation date of September 28, 2026. Keep the access confirmation screenshots, the chart export, the bank connection status pages, and the list import logs with a September 28, 2026 timestamp. If access changes during onboarding because the client adds a user after the first check, preserve the earlier snapshot and note what changed. That preserves traceability for the September 28, 2026 takeover and lets a later reviewer reproduce the 14-item starting point.

State whether the checklist covers a fresh start, a migration from prior software, or a repair of an existing QuickBooks Online file. For this September 28, 2026 takeover, the practical approach is to treat the law firm file as a migration with history, map all 62 chart accounts to active, archive, or merge candidates, confirm all 4 bank and card connections show expected history depth, and record a scope statement so the September 28, 2026 review can be reproduced, for example all balance sheet opening positions, all bank connections, and all master lists migrated as of September 28, 2026. Record the mapping decisions plainly so a reviewer can see which accounts were renamed, merged, or inactivated and why.

State what is excluded. Payroll filings inside a separate payroll system, trust compliance opinions, legal matter strategy, and reconstruction of missing source documents the client has not provided are not part of this September 28, 2026 checklist. That boundary keeps the takeover honest and prevents a reviewer from assuming legal or compliance coverage beyond bookkeeping preparation. If onboarding touches outstanding reconciliation work, link it to the related support packet such as the bank feed review guide and keep the source exports with the queued questions.

Triage opening balances and historical cleanup on September 28, 2026

For each opening balance, record the QuickBooks Online amount, the supporting prior report or statement amount, the difference, the source location, and whether the item is agreed, proposed for correction, or awaiting client documents on September 28, 2026. A prior trial balance, a bank statement, a card statement, a loan statement, a payables aging, a receivables aging, or a payroll summary may support the entry. The presence of an opening balance in QuickBooks Online is not proof it is correct when no prior report supports it on September 28, 2026.

For historical cleanup, pay particular attention to whether old transactions need coding, matching, exclusion, or accountant review. Capture the evidence that supports the triage on September 28, 2026, including the transaction count per bucket, the date range covered, and the largest items in each bucket, then state what an authorized reviewer must decide, such as approving the proposed opening-balance corrections, locking a historical period, approving the merge of duplicate accounts, or authorizing the 60-day cleanup sequence. This keeps an operational fact from being presented as an accounting conclusion.

Sidebar: Checklist notes describe what was seen on September 28, 2026. Balance and plan decisions describe who approved what and when. Keep those two layers distinct. A VA prepares the gap observation with amounts; an authorized reviewer records the correction and sequencing approval.

Check the common takeover breaks deliberately on September 28, 2026. Confirm that bank opening balances agree to statements after outstanding items, that credit card openings include cutoff accruals, that open payables agree to vendor statements for the largest vendors, that open receivables agree to the client billing system for the largest matters, that undeposited funds do not hide stale deposits, and that the payroll opening ties to the payroll provider summary rather than memory. Confirm that duplicate vendors and duplicate chart accounts are flagged for merge review instead of being left to multiply on September 28, 2026.

A useful takeover sequence for September 28, 2026

1. Confirm access and roles, file settings, and document storage locations on September 28, 2026. Save confirmations and the QuickBooks Online settings export with a September 28, 2026 timestamp.
2. Collect prior reports and statements on September 28, 2026, including the prior trial balance, bank and card statements at cutover, loan statements, payables and receivables agings, and payroll summaries. Log each source location.
3. Draft the opening-balance tie-out on September 28, 2026, comparing each QuickBooks Online balance to its support, isolating differences such as the $4,120 bank gap, the $1,850 trust subledger gap, and the $620 card accrual gap.
4. Map the chart, items, vendors, and customers on September 28, 2026, marking each line as keep, rename, merge pending approval, or inactivate, and confirm bank connections show the expected history.
5. Write the 60-day cleanup plan with sequenced phases and one specific question per gap on September 28, 2026. Avoid vague notes such as fix openings and write approve $4,120 outstanding-check correction for the operating account before posting instead.

What to put in the September 28, 2026 handoff

Add a second view grouped by status so the owner can see momentum at once. For instance, group the 11 complete items together with their evidence links, then present the 3 opening-balance gaps with amounts and one question each on September 28, 2026. Include the 60-day plan as a phased list showing weeks one through eight with named approvals per phase.

Keep the queue useful on September 28, 2026

Do not mark an opening balance as agreed when the support is still missing. Do not merge chart accounts or post historical corrections before the accountant approves them. Preserve the original QuickBooks Online balances beside any proposed correction, and attach the reason for a change after the authorized reviewer approves it. On September 28, 2026, a visible awaiting-documents state with a named client follow-up is more useful than a forced agreement that hides a gap.

Filter the checklist so the owner sees balance gaps first on September 28, 2026, then access and connection breaks, then mapping decisions, then routine complete items. Group items with the same document request together so one client reply clears several lines. Keep complete items in a separate section from the open gaps so progress is visible without losing the remaining questions. If the checklist feeds a close packet such as the month-end close packet or the reconciliation support in the reconciliation support guide, link them explicitly so the reviewer understands downstream effects on future closes.

Practical handoff note for September 28, 2026

End the file with the September 28, 2026 takeover date, the items worked, the gaps isolated, and the next checkpoint. The goal is a record another person can pick up without reconstructing the September 28, 2026 work. For this takeover, state that 14 checklist items were worked, 11 are complete with evidence, 3 opening-balance gaps totaling $6,590 in absolute differences are isolated with the $4,120 bank item, the $1,850 trust item, and the $620 card item, and a 60-day cleanup plan with phased approvals is proposed with three owner questions open. If the work touches a close review, link it to the related close packet and keep the source exports with the queued questions.

Archive the packet with the access confirmations, chart and list exports, prior trial balance, bank and card statements, aging reports, payroll summary, connection status pages, and evidence links so a later reviewer can repeat the check. Keep the archive location consistent and limit access to the approved finance team on September 28, 2026. A reviewer should be able to answer five questions quickly after reading the packet: what was taken over, what evidence supports each opening balance, what 3 gaps remain with amounts, what the 60-day sequence proposes, and who owns each open approval. That clarity keeps a new-client start explainable while keeping authority where it belongs on September 28, 2026.

Sources and further reading for September 28, 2026

• IRS Recordkeeping for supporting document retention on September 28, 2026
• IRS Publication 334 for small business recordkeeping context on September 28, 2026
• SBA Manage Your Finances for books setup cadence on September 28, 2026
• QuickBooks Online Support for setup, lists, and bank connection workflows on September 28, 2026
• Internal: services page, bookkeeping tasks guide, vendor onboarding guide, and month-end close packet for delegation boundaries on September 28, 2026

Owner CTA for September 28, 2026

If a new file or takeover still starts with logins and assumptions on September 28, 2026, define the 14-item checklist and the balance approval path before posting new activity. Get a free VA consultation to map the first handoff with a named owner and a review cadence for September 28, 2026. Keep opening-balance approval, chart decisions, and cleanup sequencing with an authorized reviewer on September 28, 2026.