I just need to change something in HTML coding

I have one Tax invoice in HTML coding . I just want to change one Picture from this coding . When i copy past the link its not working. I just need little help , how to change the picture from the HTML coding in link . Thanks

Are you looking to pay or is this a collaboration?
Pay to hire someone

Is this ongoing work or a one off job?
One-off specific project or job

How would you prefer to pay for the project?
Fixed project total

Enter your job or project budget range? (USD)
$0-25

Do you have an estimate of the job or project length?
1-2 hours

Are you a company or individual hiring?
Personal job or project

When do you want to have the freelancer secured by?
ASAP

What is most important for this job?
Cost

Does this job refer to the design of a new website, or a redesign of an existing website?
Design of an existing website

Is the current website static or dynamic?
Unsure

What programming language is the current website written in?
PHP

Is the content for the site ready?
Yes

Where did you find Twine?
From a friend