Gst on import and export of services

I have leased the web server from USA for Rs.10,000/month in April 2019.
In GSTR3B of April, I have filed it as

Table 3.1 Details of Outward Supplies and inward supplies liable to reverse charge
(d) Inward supplies (liable to reverse charge)
Total Taxable Value : Rs.10000
Integrated Tax : Rs. 1800

Table 4. Eligible ITC
(3) Inward supplies liable to reverse charge (other than 1 & 2 above)
Integrated Tax : Rs. 1800

- Is this correct Or I have to put it under "(2) Import of services" of ITC?
- And can I avail ITC for it in same month?
- Do I have put this entry in table 5 also
Table 5. Values of exempt, nil-rated and non-GST inward supplies
Non GST supply

-----------------------------------------------------------------

Now EXPORT :
And as I have rent this web server in Rs.12000/month to Europe based client.
 In GSTR3B of April, I have filed it as

Table 3.1 Details of Outward Supplies and inward supplies liable to reverse charge
(b) Outward taxable supplies (zero rated ) 
Total Taxable Value : Rs.12000
Integrated Tax : Rs. 2160

What can be done so that Integrated Tax does not get paid on Export of services?

Thanks,
Vibhukant