Refer this article for on-boarding a new RSSM.
1. Once you add a new RSSM, search for the RSSM by it's name. Click on Actions > Edit Details.
2. Go to Salary Details tab and add gross salary in CTC with TA/DA field and click on Save button.
3. If the CTC with TA/DA entered is below or above the position grade limits, a warning will be displayed.