[And] You have the actual Form 8606 and there is an indication the return has been filed or will be filed. Refer to IRM 21.4.1.3.1, Locating the Taxpayer’s Return, for additional information. Note: Consider any form received prior to the return due date as an indication the taxpayer will file. [Then] Input a TC 930 push code using your employee number as indicated in IRM 21.5.1.4.4.1, TC 930 Push Codes. Reminder: In certain instances, TC 930 push codes procedures should not be used. Refer to IRM 21.5.1.4.4.2, Inappropriate Use of TC 930 Push Code. [If] 
You are unable to determine whether an adjustment will be necessary or if you can determine that an adjustment will be needed