Quick question as regards UK tax 2014-2015

[WhatTheGox]

Just filling out my tax return, something confusing me..... i run a small business and it turns out because i have pumped so much of my profit back into stock in 2014-2015 i've actually only took £3k profit in cash haha but i have tons of stock.... but what do i submit to the gov for tax just £3k? hmmm i get up to 10k tax free anyway.

Thoughts?