I have home depot employee stock purchase plan where do I put this on my 2018 tax return

Your 1099-DIV is reported on line 121 of your tax return.

Line 121- CRA interest amounts and some foreign interest income.

To enter in the source amounts for interest and other investment income:

1. In the upper-right corner of your screen, select Find.
2. In the Find window, type Interest on Bank Accounts.
3. Select Interest on Bank Accounts Not Reported on a T slip from the list, and select Go.

 For more information from the CRA: Line 121 - Foreign interest and dividends: https://bit.ly/2HQUE4i