Do I need to renew my Non-O retirement visa before it expires?

Yes. One must renew before the old one expires. You can do that up to 14 days prior (though the time might be different depending upon your local office). Or you can fly out and come back in.

You re enter Thailand using a re entry permit on 13th March. Your current non o Visa extension based in retirement expires on 15th March. That gives you not much longer than 12 hours to apply for your new 12 month extension not counting how long it takes you to get to immigration office that issues your stamp. In my opinion that us cutting it too fine and UF you enter the country and fail to get your new stamp you will be on overstay. Personally I would not risk that and enter Thailand after your current stamp expires ie after 15th March and get stamped in 30 days Visa exempt if you qualify. You can then extend that by 30 days which gives you 60 days to get all your ducks lined up and apply for the 90 day non o based on retirement all over again. Once you have got this you can apply for a new 12 month extension provided you meet the financial and other requirements. As others have said the 90 day thing is the tm47 and has nothing to do with your Visa extension. Your 90 days will start on the day you re enter Thailand after which you will have to make the report but it can be done two weeks early or 1 week late in person. Different if you do it on line.

90 day report and non O are totally different. I done 90 day report last week. Also on date next 90 day report due is my visa expiry date which is April. I need extend before expires April

As per previous comment it really sounds like you are confused about expiry date and 90 day report. You can only do a 90 day report when you have a valid visa or visa extension. In your case this expires Mar 15.

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You need to enter Thailand before the visa expires on March 15 and apply for a 1-year non-O extension at immigration. From what I understood, Non-O retirement visa extension can be done as a 1-day process. If your document is ready, you can get the stamp within the day itself.

However, it is usually recommended not to risk going on the last day before the visa expires. Extension can be performed 30-45 days in advance. The safest is to go 2 weeks before it expires in case they request any additional doc you will have time to prepare.

Ps. Don't mix visa extension with 90 days reporting.

You can't renew your visa, you can apply for a one year extension. This you can do when you have 30 days left on your last entry stamp, some immigration offices allow 45 days.

Assuming you have a multi entry non-o visa that would be ok