I would like to amend my e-filed 2017 return and add business expenses. Should I wait until my refund has been received and then file the amended return ?

[AmyW · Accepted solution]

Yes. You will want to wait until your original tax return is processed. 

If you are receiving a refund, you should wait until the check is issued. Amended returns must be filed by mail. 

To amend a 2017 return, follow the steps in the article below (The 2017 amended tax return instructions will be available sometime in late January/Early February):

https://ttlc.intuit.com/replies/3288565