Here is a general overview of the steps you can follow to deploy a smart contract on zkSync era Testnet:

1. Choose a development environment: You can use a variety of development environments to write your smart contract, such as Remix or Truffle. Ensure that your development environment is compatible with the zkSync era Testnet.

2. Write your smart contract code: You need to write the code for your smart contract in a compatible language. zkSync supports Solidity, and you can write your code using this language.

3. Compile the code: Once you have written the code, you need to compile it into bytecode. This bytecode is what is actually deployed onto the blockchain.

4. Connect to a Web3 Provider: You will need to connect your development environment to a Web3 provider that is compatible with zkSync era Testnet. You can use Infura, Alchemy or run your own node.

5. Get testnet ETH and tokens: In order to deploy a smart contract on zkSync era Testnet, you will need testnet ETH and tokens. You can get these from a testnet faucet.

6. Deploy the contract: Using your development environment, you can deploy your smart contract onto the zkSync era Testnet by signing a transaction using your wallet. You will need to pay transaction fees in testnet ETH.

7. Verify your contract: Once your contract is deployed, you can verify it on zkScan by providing the contract address and the compiled code.

It's important to note that the process of deploying a smart contract can be quite complex, and requires a good understanding of blockchain technology and programming. It's recommended that you do some research and get comfortable with the zkSync era Testnet before attempting to deploy a smart contract. Additionally, you should ensure that you have thoroughly tested your contract before deploying it to the Testnet.

Here are some links that may be helpful for deploying smart contracts on zkSync era Testnet :

1. zkSync Documentation: https://zksync.io/documentation/

2. Remix IDE: https://remix.ethereum.org/

3. Truffle Suite: https://www.trufflesuite.com/

4. Infura: https://infura.io/

5. Alchemy: https://www.alchemy.com/

6. zkScan: https://zkscan.io/

7. Solidity documentation: https://solidity.readthedocs.io/

8. zkSync Developer Forum: https://forum.zksync.io/

9. zkSync GitHub: https://github.com/matter-labs/zksync

Note that these links are subject to change over time, but they should provide a starting point for your research.

Here is an example of a simple smart contract written in Solidity for the zkSync network:

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "zksync.sol";

contract SimpleContract is ZkSync {
uint256 public myNumber;

function setNumber(uint256 number) public onlyFromSync {
    myNumber = number;
}

function getNumber() public view returns (uint256) {
    return myNumber;
}

}