# Date Manipulation

**URL:** https://www.protaxcommunity.com/t/date-manipulation/335
**Category:** T3
**Created:** [March 13, 2015, 2:31pm UTC](https://www.protaxcommunity.com/t/date-manipulation/335 "2015-03-13T14:31:50Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![kevin](https://avatars.discourse-cdn.com/v4/letter/k/2acd7d/32.png) [@kevin](https://www.protaxcommunity.com/u/kevin)
#### Post date: [March 13, 2015, 2:31pm UTC](https://www.protaxcommunity.com/t/date-manipulation/335/1 "2015-03-13T14:31:50Z")

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I’m customizing the T3 letter and want to enter the due date of the T3 return (being 90 days after the year-end). I am trying to add 90 to the year-end date field code. Is there some way to do this in the letter template?

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### Author: ![Rob](https://sea2.discourse-cdn.com/flex016/user_avatar/www.protaxcommunity.com/rob/32/781_2.png) [@Rob](https://www.protaxcommunity.com/u/Rob)
#### Post date: [March 13, 2015, 2:36pm UTC](https://www.protaxcommunity.com/t/date-manipulation/335/2 "2015-03-13T14:36:38Z")

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Add this into letter template:

{{ format(CurrentClient.Info.CommonData.FileByDate, “January 2, 2003”) }}. This is a hidden field calculated as the T3 tax year-end date plus 90 days. If you prefer to format the date in a different way…see formatting field codes support topic

[https://www.taxcycle.com/Support/Documentation/tabid/153/ID/1242/categoryId/45/Formatting-field-codes.aspx](https://www.taxcycle.com/Support/Documentation/tabid/153/ID/1242/categoryId/45/Formatting-field-codes.aspx)

~ Rob

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### Author: ![kevin](https://avatars.discourse-cdn.com/v4/letter/k/2acd7d/32.png) [@kevin](https://www.protaxcommunity.com/u/kevin)
#### Post date: [March 13, 2015, 2:37pm UTC](https://www.protaxcommunity.com/t/date-manipulation/335/3 "2015-03-13T14:37:10Z")

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That’s great, Rob. Thanks very much!