Bookkeeping in United States
$400 per month · up to 150 transactions a month · USD
US bookkeeping breaks on two things: state sales-tax nexus nobody noticed accruing, and contractor payments that were never coded as reportable. We keep QuickBooks Online reconciled weekly so the 31 January 1099-NEC and W-2 run is a report rather than a reconstruction, and so revenue is tagged by destination state before a $100,000 threshold turns into a registration you have already missed.
Read the United States bookkeeping guide