The process is more methodical than the backlog makes it feel. It starts with gathering documentation: bank statements, credit card statements, invoices, receipts, payroll records, and anything else that captures money moving in or out. From there, every transaction is recorded and categorized correctly, then each account is reconciled against its statements so the books agree with what actually happened. The end product is a full set of financial statements for the periods you were missing.
Done well, the work also surfaces what the backlog was hiding. Reconstructing months of activity tends to reveal duplicate charges, forgotten subscriptions, and categorization habits that were quietly distorting your numbers. At Zacharin Consulting, this work is handled inside the tools you already rely on, including QuickBooks, Gusto, and bill.com, and every deliverable is reviewed by an experienced CPA. That review matters, because catch-up work is only useful if the finished records are accurate enough to file taxes and make decisions from.