If you read through the below topic it describes the process near the end but essentially to take up the moms in SEK you need to modify how you enter the Invoice where you are being charged the moms. If the Invoice has a moms charge of 250, then this was based on a purchase of 1000. So via any clearing account you would do the following two lines when entering the invoice:
Clearing account : Amount = 1000 : moms = 250
Clearing account : Amount = -1000 : moms = 0 (note minus sign)
This will put 250 in the tax liability account and nothing else as they cancel out