Hi Danika!
That really depends on how many receipts there are, and what the total of those receipts are.
If you go by word of law, then what should happen is that 2014's tax return should be adjusted to include these receipts. You can then claim any GST paid on your next GST return.
If the receipts are small enough, though, whomever prepares your tax return may choose to just include them with 2015's information. It's hard to say - every preparer has a different opinion on how to deal with a case like this. It would be best to get the advice of your tax preparer, just to be on the safe side.
I hope this helps!
