I think what you are looking for is:

I'M THANKFUL

LORD, WHEN I KNEEL TO PRAY,
AND I TRY SO VERY HARD TO SAY
HOW THANKFUL I REALLY AM TO YOU.
IN MY HEART THEN I KNOW
THAT MY WORDS COULD NEVER, EVER SHOW
WHAT MY LIFE LIVED IN THANKS
COULD SAY TO YOU.

YES, I'M THANKFUL, I'M SO THANKFUL
I LIVE MY LIFE SO THAT ALL CAN SEE
THAT I'M THANKFUL, I'M SO THANKFUL
FOR ALL YOU'VE DONE FOR ME.

I OFTEN THINK OF THE PRICE
THAT YOU PAID FOR ME ON CALVARY
FOR ONE SO UNWORTHY AS I.
THEN I REALIZE THERE'S NO WAY
THAT I COULD EVER PAY,
BUT TO LIVE EVERY DAY IN THANKS TO YOU

YES, I'M THANKFUL, I'M SO THANKFUL
I LIVE MY LIFE SO THAT ALL CAN SEE
THAT I'M THANKFUL, I'M SO THANKFUL
FOR ALL YOU'VE DONE FOR ME.

YES I'M THANKFUL, I'M SO THANKFUL
FOR ALL YOU'VE DONE,
FOR ALL YOU'VE DONE FOR ME.

I am looking for lyrics to a song I used to sing years ago, but cannot remember all the words. The one's I remember go like this:
Lord, when I kneel to pray and I try so very hard to say how thankful I really am to you,

the Chorus: I'm thankful, I'm so thankful for all you've done for me.

Hope someone can help!
Thanks.