I just noticed the receipt I got from revenue has the numbers in the wrong way around. Assuming I must have put the numbers in the wrong way around do I need to contact revenue I wonder. Basically 2018 had more expenses than this year so the liability was smaller. I paid more prelim tax for next year and it is appearing in the current year in the actual receipt I got when paid by SDI. Will Rev just credit the overcharge to next year anyway ? I guess I should have just paid the exact same for both years and there would be no problem but that's another story