Sage Intacct is where companies land when QuickBooks stops being enough and a full ERP is too much. It is a finance system built for controllers and CFOs, not for the owner doing books on a Sunday.
What it does well
The dimensional general ledger is the reason to buy it. Instead of a rigid account code structure, you tag transactions with dimensions such as department, location, project, customer or fund, and report across any combination without rebuilding your chart of accounts. Teams coming from QuickBooks class tracking describe this as the moment reporting stopped being a monthly export into a spreadsheet.
Multi entity consolidation is genuinely automatic, including cross entity transactions and currency translation. If you run a US entity and a Canadian entity, the month end close is where the license pays for itself.
Tax and filing
Sales tax and use tax run through Avalara. GST and HST are supported for Canadian entities. Intacct is a general ledger, so it feeds your tax preparer rather than filing anything itself. Nobody buys it to press a button at IRS or CRA.
Where it frustrates people
There is no public price. Every deal is quoted, most land in five figures a year, and implementation through a partner is a real project measured in months and consulting hours. Budget for both. The interface is dated next to Xero, and the learning curve is steep enough that you will train people. This is a considered purchase, not a signup.