nostr:npub1mwv5gzxtpz2pwj70e4j8tsluxm6zm3rh8xgf20j8zlte2f5hww5srfcwfe
Someone on this thread shared an excellent post from Linux Weekly News about using GnuCash as their main business accounting software.
It seem very capable, but the import process form QuickBooks is kinda fiddly. It also seemed like creating check formats for printing was a bit difficult. It's on my second tier to investigate further. I've played with it here and there over the years.