Credit for purchase of TurboTax Deluxe Online Edition

A month ago, I purchased TurboTax Deluxe Online Edition from Staples Canada. After completing my tax return, the online software has requested that I purchase a license for TurboTax Online Premier as my tax return included some investment slips (e.g. T5008, T4A, T3, T5) and rental income/costs. Is there any way I can get a credit (spent $37.99 plus PST/GST) for the original purchase toward the new cost I will now have to bear? Also, I am filing a joint tax return for me and my spouse. Will I have to pay for (2) tax returns as well? Please advise. Thanks...