How many RDP i can create for free using Lightsail service?

You asked this question already today and the responses gave you the answer https://repost.aws/questions/QUOUhOnGFkREm_dguofit1RQ/is-it-possible-to-use-ec2-service-and-lightsail-service-in-the-same-time-for-a-free-trial-account

https://aws.amazon.com/free/compute/lightsail/ With Lightsail you get 750 hours per month of the $8, $12, or $20 plans for free for three months when using Windows

https://aws.amazon.com/lightsail/pricing/

Standard charges apply after first 750 hours of usage of the selected bundle each month. Check out the following offers and save now on Amazon Lightsail.

• Three months free on Linux/Unix bundles with IPv4 address: $5 USD/month, $7 USD/month, and $12 USD/month
• Three months free on Linux/Unix bundles with IPv6 address: $3.50 USD/month, $5 USD/month, and $10 USD/month
• Three months free on Windows bundles with IPv4 address: $9.5 USD /month, $14 USD/month, and $22 USD/month
• Three months free on Windows bundles with IPv6 address: $8 USD /month, $12 USD/month, and $20 USD/month
• Three months free on the $15 USD/month Database bundle
• Three months free on the $10 USD/month Container service (Micro -1 node)
• 12 months on CDN