British Citizenship Application

[rr1506]

Apologies for a long text but I believe it is important information.
I applied for ILR in 2016 in a same day application and got it successfully. Just some background about me, I came to this country in 2008 as a student and after completing my Master’s degree from a reputable university, I got PSW. I started working during the time and I got Tier 1 which kept on getting extended as I was able to meet the point requirements. My working status has kept on changing from being Self employed to Permanent employing by reputable companies. I had two private limited companies in the past, one is before I got first Tier 1. I closed that company after I got into permanent employment. Another one was couple of years back which I am just about to close as it has been dormant from last year and half as I am in perm employment again. I will be withdrawing all the funds now before I close the company and will declare as my personal income when I file the returns in 2016-17.
During my same day ILR application through a solicitor, something happened. Case worker called me and asked me for more information about my private limited companies. He asked me to fill out a form which I did. The form had questions about if I have any Private limited companies or had in the past and if all the tax returns were done correctly. Because the tax returns were not due for the company, I replied N/A and explained that the tax returns will be done in two months time but all other taxes i.e. VAT etc. are up to date. However I had genuinely forgot about the first sole trader company I had. I could not remember anything about the company because it had been so long. I told case worker that I have completely forgotten anything about it and I do not have any documentation either. I will be able to get the bank statements if I go to the bank but the company has been closed. I had to answer the question regarding whether the tax returns of the company were done properly or not and I answered that yes it was. My solicitor that day scared me and said that may be my taxes were not correct and that is why they will refuse my application etc. I was scared to death at that time. He almost made me believe that I had not done the taxes correct. Now I am trying to find the ways to find out about the company and if the taxes were done correctly or not and if not, I would want to put them right before I apply for citizenship. Please do not think that I am doing this for citizenship because I can certainly avoid this if I wait for my citizenship application a bit longer.
My two questions are:
Is there a way where I can find out about the company and ensure that all the taxes are correct and if they are not, can I put them right now? If yes, will have any adverse effect on my application?
Can there be a chance my citizenship application will be or might be refused based on this (deception)?