Can I pre-pay my tax? Yes you can! BAS Agent's Blog, Business Topics / By Louise McLoughlin / 27 January 2016 27 January 2016 / ATO, BAS, Prepaying Tax, Prepayments, Tax / 2 minutes of reading Once upon a time, believe it or not, you couldn’t pre-pay your tax – no, really! If you tried to do this, the ATO would just refund it straight back to you because they didn’t know what to do with it! Well, as of January 2016, this has all changed!