CRA has me under review fro Line 457 of my tax return, I am self employed, my own business, they are challenging me on Employee and partner GST/HST rebate Help!

If you deducted expenses from your income as an employee (line 21200 or 22900 of your return) or as a partner (lines 13499 to 14300 of your return), you may be eligible for a rebate of the GST/HST you paid on those expenses. 

As per CRA-

Generally, you can claim this rebate if one of the following applies:

• your employer is a GST/HST registrant, other than a listed financial institution
• you are a member of a GST/HST-registered partnership, and you have reported on your return your share of the income from that partnership

Please click here to view what this entitles as per CRA.