Go to overview of changing to single currency
If you change your base currency from eg Sterling to Euros in the middle of the year, all previous Sterling entries for this year will be considered to be Euros. That would give you a headache!
You will be prompted to make the change when you set up a new accounting year.
If you need to account for Euros before then, just treat Euros like any other foreign currency and set up a new item in your list of foreign currencies.
When you do set up the next accounting year, you will need to carry out the following three actions:
Change your base currency to Euros from what it was previously, eg Sterling.
Make sure that the currencies of your various Bank, Charge, Supplier and Customer accounts are set correctly.
Make sure the values of your Assets and Liabilities are carried forward from the previous years in the correct currencies.
You have now successfully converted to Euros
Please make sure the currencies in your list of foreign currencies are set to the correct exchange rates versus the Euro
When your Bank tells you it is converting to Euros, all you have to do is to go to the Account Names list, select the relevant account and use the Change button to change the currency for that account to Euros.
You will also need to review with your Bank any standing orders paid by them after they convert to Euros.