Form W-4P Step 2 Line 2bi

I'm retiring from my job on May1 my income is already taxed.  I will start getting my pension in June.  My husband will continue working and his income is taxed.  His annual pay is $40,200.  We file married jointly.  I need to know what my entry for step 2 line 2bi would be?  I've had some people tell me to leave it blank or put zero down.  What is the correct entry for this line>