How do you add multiple tax years in Part I of a 9465 where it says "Enter Tax Year(s) or Period(s) Involved"? It gives examples, but you can only enter 4 characters, such as 2019.   What happens if you need to enter a string of dates, such as 2015, 2017- 2019.   My client cannot figure out an OPA and this is the only way to get them set up. 

Just for clarification, I am not referring to the dollar amounts in line 5 or 6.   Thank you in advance!