I run everything thru one bank account, credit card account - keep it simple. I can download a qif file (Quicken) to my computer and process automatically. With Quicken I can categorize business expenses and income then print out a report.
I do my estimated taxes every quarter and pay as required, however I let an experienced account do my annual taxes for a sanity check.
If you’re small, managing your own accounting is a good ideal as this keeps you sharp on expenses and revenue.
Not that hard…