I have replied to this question in previous thread

The Income Tax Act has laid out exemptions under Section 54 and Section 54F to help taxpayers save tax on capital gains.

(1)Exemption under Section 54 is available on long-term Capital Gain on sale of a House Property.

(2)Exemption under Section 54F is available on long-term Capital Gain on sale of any asset other than a House Property.

To reiterate, both the exemptions are available only on long-term capital gains.

Common requirements between the two Sections:
A new residential house property must be purchased or constructed to claim the exemption
The new residential property must be purchased either 1 year before the sale or 2 years after the sale of the property/asset.
Or the new residential house property must be constructed within 3 years of sale of the property/asset
If you are not able to invest the specified amount in the manner stated above before the date of tax filing or 1 year from the date of sale, whichever is earlier, deposit the specified amount in a public sector bank (or other banks as per the Capital Gains Account Scheme, 1988).
Only ONE house property can be purchased or constructed.
Starting FY 2014-15 it is mandatory that this new residential property must be situated in India. The exemption shall not be available for properties bought or constructed outside India to claim this exemption.

If i invest in purchasing and constructing the commercial property then can i avail tax exemption or if i invest the same in lal dora property ie not for agriculture purpose ie it can be used for residential or as well as for commercial then in this case can avail tax exemption

Investment in commercial property - No exemption
You have to invest compulsorily in a residential property to take benefit of this exemption

What would b my long term capital gain in this case ie i brought a property for 90000rs in 1995 and made a construction for 50000rs but doesnt have any bill to show for construction and also renovate the buliding in 2007 which cost me 4lakhs but don't have any bill for the same and now want to.sell the property for 80lakh now what would be my long term capital gain for the same

Please ask your question

You can read this article:
https://www.finaco.in/view_finance_feed.php?feed_id=51

Yes you can adjust

Error Code 38 is for Tax determined as payable in the return of income filed but has not been paid, Check and do accordingly

You can start as a Sole proprietorship business which does not requires any registration. Further with respect to GST you have to register if your turnover exceeds 20 Lakhs for the financial year. If you want to run your website as a Pvt ltd company then you have to register it.

Please go ahead and ask your question

Please be specific, The meaning of your question is not clear.
Paying anything extra in respect to what ?