Its urngent-rectification u/s. 154 ?

Hello everyone,

i have made following mistakes in the income tax return of my following clients.

1. return of MRS.X (ITR-4S) for a.y.11-12 filed on 30/07/12. But by mistake gender was selected as "Male" and it has resulted in tax payable.client has not received 143(1) yet.

2. return of mr. x (ITR-4S) for a.y.11-12 was filed on 30/07/2012 but TDS schedule were not filled. it has resulted in tax payable. intimation u/s. 143(1) not received. 

1. kindly let me know if i can rectify the  return u/s. 154 or not ?

2. if yes then which option should we select in the excel sheet i.e. 139(1)/139(4)/135(5)/153A/153C/148 etc. there is no section 154 ?