Spreadsheets to Xero

Hi everyone, this is my first post on here, newly qualified AATQB

I have a client that has been only been trading for a couple of years and has until now been using spreadsheets. They are now using Xero. I followed advice and posted transactions/invoices/bills etc since the start of the current VAT quarter, I have since submitted the VAT for this period.

I'm just checking what the best advice is going forward in regards to previous figures, and if there is anything in particular I should now do?

Thank you for your help