I'm pretty much in the same boat.

I've already had to re-create all transactions since last September (beginning of the FY) with foreign suppliers - not too many but still took a few hours. I intend to file last Quarter's VAT (March-May) using Desktop and then the VAT entries should be good from 1 June.

Much as this is a painful process I don't think QBO is as bad as some people say - I've been using it since 2021 for another business. The interface of QBD is very 1990's and is only available on Windows. QBO is web-based and has a much clearer look. The Bank Feeds are great.

Running the Data Server was so sluggish that we changed to just running on one PC and taking turns to screen share into it (cue regular " have you finished with the PC yet? on WhatsApp).

Having said that, finding no PO Number as a default on Invoices was a shocker, as is the lack of Credit Limits for customers.