Does disability influence the tax calculation on lumpsum pension fund payout?

If I have been really receiving a disability income from my place of work, how does this affect my pension fund lump sum payout? Is disability taken into account when the lumpsum is taxed?

Do you receive a monthly amount - do they provide you an IRP5?

I will be receiving a lumpsum pension fund around March 2016. I am receiving a monthly disability income currently to age 55 (Feb 2016)

It will not affect the tax on the lumpsum payout.