Let me continue what I started so we fixed this, lizelle-cjctax-c!

I just want to make sure that we're on the same page. Is the R6.80 a bank fee? Was it deducted from the total payment you received? If so, you can follow the steps I shared above.

Record the invoice payment worth R2,890.08 (or the exact invoice amount) and deposit it to the Undeposited funds (UF). Once you make a deposit, from UF to the bank in QuickBooks, add the R6.80 as a negative amount on the Add funds to this deposit section. Make sure that the total is the same as the actual fund you received so you can match the downloaded transaction and the deposit you created in QuickBooks Online.

Another way to fix it is by adding a new transaction upon matching them. On the Match transactions window, toggle the Resolve Difference button at the bottom. The Add resolving transactions section will appear so you can categorise the R6.80 difference.

For the detailed steps, here's how to categorise and match online bank transactions in QuickBooks Online.

Additionally, I suggest deleting the journal entry you created as it won't offset the invoice balance.

Comment again below if you need anything else. Take care!