Sales Tax % change

Hi, I need immediate help here!

Effective today, July 1st there is a change in Tax %, now all previously invoiced clients and paid invoices show up with a balance for the difference in tax change. How can this be fixed?? I tried giving it a new name but that didn’t seem to fix the problem.

Also, in a few months there will be another addition (different %) for B2B, I need to be able to choose from one tax to the other, not have it all summed up as 1 tax. Please help!

Are you using customer tax codes? If so, you should be able to create a new custom code (with a different name). Don’t just edit the name. You have to actually create a new code.