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>

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